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Ostrovityanka [42]
3 years ago
14

A hydrogen filled balloon has a volume of 8.3 L at 36°C and 751 mmHg. How many moles of hydrogen are inside the balloon?

Chemistry
1 answer:
tamaranim1 [39]3 years ago
8 0

Answer: I think the formula is PV=nRT and I divide both sides by RT, but this is as far as I can get in my equation before I get stumped: (751 mm Hg) (8.3 L)/ (309 K) Can you help?

Explanation:

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Answer:

It is called Asterism.

Explanation:

It is Asterism because Asterism refers to a pattern of stars that are seen in night sky and are very distinctive and identifiable. These group of starts have patterns. It visually seen collection of stars and it's indicate their properties and the lines that connect the stars together. It actually range from small shapes of stars to more complex stars that cover segment of the sky. The stars may be bright naked or have similar brightness.

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3 years ago
What is the first step in balancing a redox reaction by the half-reaction method?
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First step is to balance the amount of atoms on each side

So for example if my equation that I have to balance is : Br2 -> Br-

First thing I would have to do would be :
Br2 -> 2Br-

Then I would have to balance the charges on both sides. So because there is a -2 charge on the right side I will have to add a -2 charge onto the right side as well. I would do this by :
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And now you can see the amount of atoms and the charges are balanced... So your overall reaction is now balanced too.
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3 years ago
A student needs to use the metric system while measuring the length of a box. Which units should he use?
Roman55 [17]

Answer:

Centimeters or milimeters.

Explanation:

The answer depends on the size of the box.

<em>The metric system </em><u><em>base</em></u><em> unit for length is the meter</em>. <em>Centimeters</em> and <em>milimeters</em> are thus also part of the metric system.

If the box is a "regular-sized" box that we use to put stuff in (books, presents, etc), then centimeters would be the most appropiate.

If we're talking about those tiny boxes that are printed on paper (for example in some notebooks) then milimeters would be the most appropiate.

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So fission and fusion both released large amount of energy.


6 0
4 years ago
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